Rossholmen

Site 12018 · Kvam municipality · Production area 3, Karmøy til Sotra

Below the lice limit, week 39Operated by Lingalaks AS · group unknown

0.33Adult female lice per fishLimit 0.50 · below the limitWeek 39, 2026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Weeks above the limit in 2026of 29 weeks with a countCalculated by the Salmon Ledger · Norwegian Food Safety Authority · updated 01 Oct 2026

3Lice treatments in 2026Latest: Mechanical delousing, week 30, 20262026 · Norwegian Food Safety Authority · updated 01 Oct 2026

0Active disease casesNone recordedRegister since 26 Nov 2024 · Norwegian Food Safety Authority · updated 01 Oct 2026

1Wellboat visits in 2026by 1 vessel · latest 10 Mar 2026Derived from AIS · Norwegian Coastal Administration (AIS) · updated 01 Oct 2026

1Escapes reportedNumber unknown, August 2019Since 2006 · Directorate of Fisheries · updated 01 Oct 2026

Sea lice against the limit

Weekly average of adult female lice per fish, as reported by the company. For this site the limit is 0.2 in weeks 16–21 and 0.5 for the rest of the year. Hatched weeks have no count and count neither as above nor below.

2026

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2026
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.05	0.2	Below the limit
21	0.14	0.2	Below the limit
22	0.02	0.5	Below the limit
23	0.12	0.5	Below the limit
24	0.14	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.00	0.5	Below the limit
27	0.00	0.5	Below the limit
28	0.12	0.5	Below the limit
29	0.24	0.5	Below the limit
30	0.02	0.5	Below the limit
31	0.10	0.5	Below the limit
32	0.05	0.5	Below the limit
33	0.12	0.5	Below the limit
34	0.02	0.5	Below the limit
35	0.12	0.5	Below the limit
36	0.05	0.5	Below the limit
37	0.05	0.5	Below the limit
38	0.10	0.5	Below the limit
39	0.33	0.5	Below the limit

Earlier years

20250 of 34 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2025
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	unknown	0.5	Not reported
11	unknown	0.5	Not reported
12	unknown	0.5	Not reported
13	unknown	0.5	Not reported
14	unknown	0.5	Not reported
15	unknown	0.5	Not reported
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.00	0.2	Below the limit
21	0.00	0.2	Below the limit
22	0.00	0.5	Below the limit
23	0.14	0.5	Below the limit
24	0.00	0.5	Below the limit
25	0.05	0.5	Below the limit
26	0.05	0.5	Below the limit
27	0.06	0.5	Below the limit
28	0.05	0.5	Below the limit
29	0.05	0.5	Below the limit
30	0.02	0.5	Below the limit
31	0.05	0.5	Below the limit
32	0.00	0.5	Below the limit
33	0.02	0.5	Below the limit
34	0.07	0.5	Below the limit
35	0.10	0.5	Below the limit
36	0.05	0.5	Below the limit
37	0.10	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.05	0.5	Below the limit
40	0.38	0.5	Below the limit
41	0.26	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.02	0.5	Below the limit
46	0.12	0.5	Below the limit
47	0.31	0.5	Below the limit
48	0.43	0.5	Near the limit
49	0.36	0.5	Below the limit
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20241 of 40 weeks with a count above the limit

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2024
Week	Adult female lice per fish	Lice limit	Status
1	unknown	0.5	Not reported
2	unknown	0.5	Not reported
3	unknown	0.5	Not reported
4	unknown	0.5	Not reported
5	unknown	0.5	Not reported
6	unknown	0.5	Not reported
7	unknown	0.5	Not reported
8	unknown	0.5	Not reported
9	unknown	0.5	Not reported
10	0.00	0.5	Below the limit
11	0.00	0.5	Below the limit
12	0.00	0.5	Below the limit
13	0.00	0.5	Below the limit
14	0.00	0.5	Below the limit
15	0.00	0.5	Below the limit
16	0.00	0.2	Below the limit
17	0.00	0.2	Below the limit
18	0.00	0.2	Below the limit
19	0.00	0.2	Below the limit
20	0.02	0.2	Below the limit
21	0.00	0.2	Below the limit
22	0.10	0.5	Below the limit
23	0.04	0.5	Below the limit
24	0.05	0.5	Below the limit
25	0.00	0.5	Below the limit
26	0.05	0.5	Below the limit
27	0.26	0.5	Below the limit
28	0.00	0.5	Below the limit
29	0.00	0.5	Below the limit
30	0.07	0.5	Below the limit
31	0.24	0.5	Below the limit
32	0.36	0.5	Below the limit
33	0.33	0.5	Below the limit
34	0.95	0.5	Above the limit
35	0.00	0.5	Below the limit
36	0.00	0.5	Below the limit
37	0.00	0.5	Below the limit
38	0.00	0.5	Below the limit
39	0.00	0.5	Below the limit
40	0.00	0.5	Below the limit
41	0.05	0.5	Below the limit
42	0.05	0.5	Below the limit
43	0.14	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.09	0.5	Below the limit
46	0.14	0.5	Below the limit
47	0.32	0.5	Below the limit
48	0.45	0.5	Near the limit
49	0.45	0.5	Near the limit
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

20230 of 10 weeks with a count above the limit (data from week 40)

Source: Norwegian Food Safety Authority, weekly lice counts reported by the companies · Limit: Regulation on sea lice control § 8 · Updated 01 Oct 2026

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Adult female lice per fish per week, 2023
Week	Adult female lice per fish	Lice limit	Status
40	0.00	0.5	Below the limit
41	0.00	0.5	Below the limit
42	0.00	0.5	Below the limit
43	0.00	0.5	Below the limit
44	0.00	0.5	Below the limit
45	0.00	0.5	Below the limit
46	0.10	0.5	Below the limit
47	0.05	0.5	Below the limit
48	0.07	0.5	Below the limit
49	0.00	0.5	Below the limit
50	unknown	0.5	Not reported
51	unknown	0.5	Not reported
52	unknown	0.5	Not reported

Treatments

Norwegian Food Safety Authority

Week 30, 2026
Thermal delousing, Mechanical delousingWhole site
Week 25, 2026
Mechanical delousing, Thermal delousingWhole site
Week 42, 2025
Mechanical delousing, Thermal delousingWhole site
Week 27, 2025
Mechanical delousing, Thermal delousingWhole site

Show all 8

Week 24, 2025
Mechanical delousing, Thermal delousingWhole site
Week 35, 2024
Thermal delousing, Mechanical delousingWhole site
Week 28, 2024
Thermal delousingWhole site
Week 23, 2024
Mechanical delousing, Thermal delousingWhole site

Disease

Norwegian Food Safety Authority

No cases in the Food Safety Authority's register of notifiable diseases (since 26 Nov 2024).

Escapes

Directorate of Fisheries

23 Aug 2019
Escape of salmon, number unknownDirectorate of Fisheries

Wellboat visits

1 visits in 2026

Visits are derived by us from the Coastal Administration's AIS positions: a fish carrier stationary within 500 metres of the farm for at least 30 minutes. The AIS archive lags about 17 days. A visit is not proof of infection.

Arrival	Vessel	Previous farm (14 days)	Duration
10 Mar 2026	Mowi Star	Tveitnes	8 h 30 min
19 Apr 2025	Mowi Star	Raunevågen	2 h 2 min
07 Mar 2024	Mowi Star	Djupestallen	1 h 53 min

Source: Norwegian Coastal Administration (AIS) · calculated by the Salmon Ledger · updated 01 Oct 2026

Licences

Site MAB: 500 tonnes

Licence	Type	Capacity	Holder
H KM 0001	Kommersiell / matfiskSalmon, Rainbow trout, Trout	875 t	Lingalaks AS
H KM 0004	Kommersiell / matfiskSalmon, Rainbow trout, Trout	875 t	Lingalaks AS
H KM 0005	Kommersiell / matfiskSalmon, Rainbow trout, Trout	875 t	Lingalaks AS
H KM 0018	Kommersiell / matfiskSalmon, Rainbow trout, Trout	875 t	Lingalaks AS
H KM 0024	Visning / matfiskSalmon, Rainbow trout, Trout	500 t	Lingalaks AS

Source: Directorate of Fisheries, aquaculture register · updated 01 Oct 2026